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A , B , C , D , E , F are conducting plates each of area A and any two consecutive plates separated by a distance d . The net energy stored in the system after the switch is closed is

Options

  1. A3 ε 0 A 2 d V 2
  2. B5 ε 0 A 12 d V 2
  3. Cε 0 A 2 d V 2
  4. Dε 0 A d V 2

Correct answer

C. ε 0 A 2 d V 2

Step-by-step solution

C e f f = ε 0 A d since effective field between plates A and E is zero ∴ U = 1 2 C V 2 = ε 0 A 2 d V 2

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